Well, any website today can have some JavaScript that verifies that ads and tracking cookies are loaded and executed before actual content loads. If the adverti

Well, any website today can have some JavaScript that verifies that ads and tracking cookies are loaded and executed before actual content loads. If the advertisement is not shown successfully, then the script can refuse to load the content too. I am also not sure how stream prioritization will affect Ghostery, AdBlock or other browser plugins. Is there any evidence that these plug-ins are not able to do things in HTTP/2 (e.g. blocking URLs, domains, preventing DOM elements from showing up, deleting cookies, etc...) that they could in HTTP/1? I would be interested to know.